Cylinder for internal-combustion motors and the like.



NO 818,536. 'PATENTED FEB. 27, 1906.

' O M. THIER. CYLINDER FOR INTERNAL COMBUSTION MOTORS AND THE LIKE.

APPLICATION FILED MAR.28. 1904 frweniom 77in 72581! o v O, 154% L en UNITED STATES PATENT OFFICE.

MAX THIER, or ERFURT, GERMANY. I CYLINDERFOR INTERNAL-COMBUSTION morons AND THE LIKE.

man Em eror, residing at No.1 Dorotheen strasse, rfurt, in the Kingdom-of Prussia, German Empire, have invented certain new and useful Improvements in Cylinders for Internal-Combustion Motors and the Like, of a which the following is a specification.

The cylinders of internal-combustion motors and the like are at their inner surface exposed to a very great'wear and tear, so that the cylindereasily loses its former circular shape. Generally, also, anew piston corresponding to the somewhat enlarged diameter of the cylinder must be provided. It hasalv ready been proposed to overcome the abovementioned drawback by making the inner portion of the cylinder exchangeable by means of exchangeable pieces of. tube the length of which corresponds to the length of the path of the tion of the cylin er is strongly heated by the explosions or the like and as theouter' ortion of the cylinder is exposed to the 000 g action of the water, where a jacket is used, the differences between the outer diameter of the exchangeable tube and the inner diameter of the body portion of the'cylinder become so great that the inserted cylinder is liable to be deformed and its exchange is made nearly impossible. In order to overcome also this drawback, I have devised the expedient illustrated in the accompanying drawings, in which I Figure 1 shows a longitudinal section through a cylinder constructed according to my invention. Fig. 2 is a section in line A B of Fig. 1. Fig. 3 is a section in line C D of Fig. 1, and Fig. 4 is a longitudinal section through a modified form of construction.

Instead of making the lining of the cylinder in one piece, as heretofore,I make it of several piecessay sixthe longitudinal edges of which are either serrated, as in Fig. 1, or curved, as in Fig. 4, the arrangement being in either case such that there are single or separated projections, and spaces between the edge of the neighboring portion, as shown.

same, the projections of one portion of the lining taking into the spaces or recesses at the In the form of construction shown in Figs. 1, 2, and 3 the lining b of the cylinder at has angular projections c and recesses a; but the Specification of Letters Patent. Application filed March 28. 1904. Serial No. 200,448;

piston; but as the inner por- Patented Feb. 27, 1906.

. of the projections 33 and of the opposite end of the recess wherein the projection takesthat is to say, these spaces exist after the piston has been inserted into the lining, when the bore of the cylinder, inasmuch as the stroke of thepiston is concerned, is just filled out by the lining. i

There may be special means rovided for pressing the pieces of the lining dagainst the pistonfor instance, s rings such as d,Figs; 1 and 3, which are he d in suitably-shaped grooves of the cylinder a. other means may be employed for thus keeping the portions of the lining in a constantcontact with the piston. The small spaces left in the recesses c serve for retaining the oil or other lubricant, so that the piston isalways properly oiled; but the object of said small s aces is also to allow of the being inc eased in diameter when the interior surface of the same has been worn out. The portions of the lining can then be made to .sli htl a proach one another and the proper contact 0 them with the piston may agai'n be maintained by a spring or the like.

Instead of letting each portion of the lining have a uniform thickness throughout its own Of course also i length I may make the portions wed eshaped, as'shown in Fig. 4:. In this case t e outer diameter of the lining increases in the direction from the closed end of the cylinder to the o enend, and this end is embraced by a screw-t eaded ring 0, which is so shaped that the lining b can be pressed into the cylinder by means of thisring.

In the form of construction shown in Fig. 4 the projections c are curved; but the relative dimensions are also in this case chosen in such a way that there remain in the recesses 0 small spaces ada ted to receive a certain small quantity of the lhbricant.

By constructing the lining in the manner shown in Fig. 4 there is no possibility of burned ortions of the lubricant entering between t e lining and the body portion of the cylinder, so that the contact between the arts a and b is always maintained, and the ining is thus cooled by the water contained in the jacket. (Not shown.) y Having now described my. invention, what I desire to secure by Letters Patent of the United States is 1. In a cylinder for internal-combustion iIc lel parts, extending parallclly to the longitu- I dinal axis of the cylinder and means adapted to prevent a relative displacement of one part of the lining with respect to another, for the purpose as described. v 2. In a cylinder for internal-combustion engines and the like, the combination With the body portion of the cylinder, of an interior lining consisting of a plurality of parallel parts extending parallelly to the longitudinal axis of the cylinder, the longitudinal edges of each part'having projections adapted to enter into corresponding recesses of the adjoining edge of the neighboring part, substantially and for the purpose as described.

3. In a cylinder forinternal-combustion engines and the like, the combination with the body portion of the cylinder, of a lining consisting of a-plurality of parallel parts, and means adapted to prevent a relative displace- I ment of one part of the lining With respect to another, the thickness of each part of the lining increasing in the direction from the closed end of the cylinder to the open end, substan-' tially and for the purpose as'described.

4. Ina cylinder for internal-combustion engines'and the like, the combination With the body portion of the cylinder, of a lining consisting of a plurality of parallel parts, and

means adapted to prevent a relative displacement of onepart of the lining With respect to another, the thickness'of each I art of the lining increasing in the direction om the closed end of the cylinder to the open end, in such a manner, that the outer diameter of the lining increases correspondingly, the bo e of the cylinder being correspondingly sha ed, and means for forcing said lining into t 1e cylinder, substantially as described. it

In Witness whereof I have hereunto set my hand in presence of two Witnesses.

MAX THIER.

Witnesses:

FRANZ PETERS, ERHARD WETZEL. 

